Import upstream Github python/cpython ref 'main'

Summary:
Imported python/cpython `3.15.0a5+` from upstream rev [`29f1e77`](https://www.github.com/python/cpython/commit/29f1e778faaa31479e4ef84e2fb37a7a53984550) (committed 2026-01-24 02:34:41+00:00).

# Commit Info

Base: (`3.15.0a5+`) - [`f8262b8`](https://www.github.com/python/cpython/commit/f8262b84f5b76e45cfea9d73b09657919926850f) (commit date: 2026-01-22 22:00:37+00:00)
Imported: (`3.15.0a5+`) - [`29f1e77`](https://www.github.com/python/cpython/commit/29f1e778faaa31479e4ef84e2fb37a7a53984550) (commit date: 2026-01-24 02:34:41+00:00)

# Files added

```
Misc/NEWS.d/next/Core_and_Builtins/2026-01-19-01-26-12.gh-issue-144005.Z3O33m.rst
Misc/NEWS.d/next/Security/2026-01-21-12-34-05.gh-issue-144125.TAz5uo.rst
```

Differential Revision: D91388517

fbshipit-source-id: b342ae94fec40b25b6c879407488e17a8a4638a2

Author: generatedunixname1734921407115435

cinderx/Interpreter/3.15/Includes/Python/ceval_macros.h

@@ -433,7 +433,7 @@ do {                                                   \
         JUMP_TO_LABEL(error);                          \
     }                                                  \
     if (keep_tracing_bit) { \
-        assert(((_PyThreadStateImpl *)tstate)->jit_tracer_state->prev_state.code_curr_size == 2); \
+        assert(uop_buffer_length(&((_PyThreadStateImpl *)tstate)->jit_tracer_state->code_buffer)); \
         ENTER_TRACING(); \
         DISPATCH_NON_TRACING(); \
     } \

cinderx/Interpreter/3.15/Includes/generated_cases.c.h

@@ -318,6 +318,9 @@
             _PyStackRef left;
             _PyStackRef right;
             _PyStackRef res;
+            _PyStackRef l;
+            _PyStackRef r;
+            _PyStackRef value;
             /* Skip 1 cache entry */
             // _GUARD_BINARY_OP_EXTEND
             {
@@ -349,25 +352,32 @@
                 STAT_INC(BINARY_OP, hit);
                 _PyFrame_SetStackPointer(frame, stack_pointer);
                 PyObject *res_o = d->action(left_o, right_o);
-                _PyStackRef tmp = right;
-                right = PyStackRef_NULL;
-                stack_pointer[-1] = right;
-                PyStackRef_CLOSE(tmp);
-                tmp = left;
-                left = PyStackRef_NULL;
-                stack_pointer[-2] = left;
-                PyStackRef_CLOSE(tmp);
                 stack_pointer = _PyFrame_GetStackPointer(frame);
-                stack_pointer += -2;
-                ASSERT_WITHIN_STACK_BOUNDS(__FILE__, __LINE__);
                 if (res_o == NULL) {
                     JUMP_TO_LABEL(error);
                 }
                 res = PyStackRef_FromPyObjectSteal(res_o);
+                l = left;
+                r = right;
+            }
+            // _POP_TOP
+            {
+                value = r;
+                stack_pointer[-2] = res;
+                stack_pointer[-1] = l;
+                _PyFrame_SetStackPointer(frame, stack_pointer);
+                PyStackRef_XCLOSE(value);
+                stack_pointer = _PyFrame_GetStackPointer(frame);
+            }
+            // _POP_TOP
+            {
+                value = l;
+                stack_pointer += -1;
+                ASSERT_WITHIN_STACK_BOUNDS(__FILE__, __LINE__);
+                _PyFrame_SetStackPointer(frame, stack_pointer);
+                PyStackRef_XCLOSE(value);
+                stack_pointer = _PyFrame_GetStackPointer(frame);
             }
-            stack_pointer[0] = res;
-            stack_pointer += 1;
-            ASSERT_WITHIN_STACK_BOUNDS(__FILE__, __LINE__);
             DISPATCH();
         }